Hi, Adam.

 

I found the place to change the link for the Home icon image in NewMessengerMain.htm:

 

            <span class="MessangerToolbarItem" hoverclass="MessangerToolbarItemHover">
                <a href="http://www.posxpr.com" target="_blank"><img src="#__cc_urlbase#Images/home.png" border="0" /></a>